Newt Schmander's Suitcase is a gadget used by Newt Schmander and one of the Foundation Elements. It is used to store all his magic creatures and samples e.g. Hippogriff eggs and has a secret Muggle Worthy button to turn it into a normal suitcase to avoid detection from any Muggles. It is also very similar to the TARDIS due to it being bigger on the inside allowing Newt to go inside of it as well.
In the trailer for Year 2, Newt puts Beast Boy inside of it.